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　　These factors may lead to premature engine failure

　　1、氣門的光磨在自動上料攪拌車的維修中，如果氣門出現(xiàn)燒蝕、麻點(diǎn)及凹陷時，均應(yīng)進(jìn)行光磨，一般是在光磨機(jī)上進(jìn)行，作業(yè)時需要注意四個問題：一是保證氣門頭與桿部同心，否則應(yīng)先校直；二是光磨輛在能磨出完整的錐面的前提下是越小越好；三是盡量提高表面光潔度；四是氣門桿端部凹陷應(yīng)予以磨平。

　　1. In the maintenance of the automatic feeding mixer, if the valve is ablated, pitted and sunken, it should be polished. Generally, it is carried out on the smooth mill. Four problems should be paid attention to during the operation: first, ensure that the valve head is concentric with the rod, otherwise straighten it first; second, the smaller the smooth grinding vehicle can grind out the complete conical surface, the smaller the better; third, try to improve the meter The fourth is that the end depression of valve stem should be ground smooth.

　　2、氣門導(dǎo)管的鉸銷氣門桿與氣門導(dǎo)管配合間隙是決定氣門導(dǎo)管使用壽命的關(guān)鍵，因此當(dāng)更換新的氣門導(dǎo)管時，鉸銷時應(yīng)嚴(yán)格掌握好配合間隙，使用各攪拌車車型規(guī)定間隙的下限，可有效延長使用壽命。

　　2. The fit clearance between the hinge pin and the valve guide of the valve guide is the key to determine the service life of the valve guide. Therefore, when replacing a new valve guide, the fit clearance should be strictly controlled. Using the lower limit of the clearance for each mixer can effectively prolong the service life.

　　3、氣門的研磨氣門的研磨分為兩種情況：一是氣門與氣門座只有輕微麻點(diǎn)，不需要光磨和鉸銷時的研磨；二是氣門與氣門座均經(jīng)過光磨和鉸銷后的研磨。前者先用足金鋼砂研磨，將麻點(diǎn)研磨掉后，再用細(xì)金剛砂研磨，涂上機(jī)油研磨，直密封符合要求，寬度符合規(guī)定為止。后者只有密封性達(dá)不到要求時才進(jìn)行研磨，但操作時要注意，不要過分用力，嚴(yán)禁將氣門上下敲打，否則將出現(xiàn)凹形砂痕，影響維修質(zhì)量。

　　3. The grinding of valve can be divided into two situations: one is that there are only slight pockmarks between the valve and the valve seat, and there is no need to polish and ream the pin; the other is that both the valve and the valve seat are polished and grinded after hinge pin. The former is first ground with full gold steel sand, after grinding off the pitting, then grind with fine emery and oil until the sealing meets the requirements and the width meets the requirements. The latter can only be grinded when the sealing performance can not meet the requirements. However, attention should be paid not to use too much force. It is strictly forbidden to knock the valve up and down, otherwise concave sand marks will appear, which will affect the maintenance quality.

　　以上是關(guān)于影響攪拌車發(fā)動機(jī)過早損壞的因素，希望大家能多加注意，如您想要了解更多內(nèi)容歡迎點(diǎn)擊自動上料攪拌車http://jackpetty.net官網(wǎng)。

　　The above is about the factors that affect the premature failure of the mixer engine, I hope you can pay more attention, if you want to know more, welcome to click the automatic feeding mixer http://jackpetty.net Official website.